std::bad_exception

From cppreference.com

Defined in header `<exception>`

class bad_exception;

std::bad_exception is the type of the exception thrown by the C++ runtime in the following situations:

1) If a dynamic exception specification is violated and std::unexpected throws or rethrows an exception that still violates the exception specification, but the exception specification allows std::bad_exception, std::bad_exception is thrown.

2) If std::exception_ptr stores a copy of the caught exception and if the copy constructor of the exception object caught by current_exception throws an exception, the captured exception is an instance of std::bad_exception.

Inheritance diagram

Inherited from std::exception

Member functions


(destructor) [virtual]	destructs the exception object (virtual public member function of `std::exception`)

what [virtual]	returns an explanatory string (virtual public member function of `std::exception`)

[edit] Example

run this code

#include <iostream>
#include <exception>
#include <stdexcept>
 
void my_unexp() { throw; }
 
void test() throw(std::bad_exception)
{
    throw std::runtime_error("test");
}
 
int main()
{
    std::set_unexpected(my_unexp);
    try {
         test();
    } catch(const std::bad_exception& e)
    {
        std::cerr << "Caught " << e.what() << '\n';
    }
}

Output:

Caught std::bad_exception

Language
Standard library headers
Concepts
Utilities library
Strings library
Containers library
Algorithms library
Iterators library
Numerics library
Input/output library
Localizations library
Regular expressions library (C++11)
Atomic operations library (C++11)
Thread support library (C++11)


(constructor)	constructs the `bad_exception` object (public member function)

operator=	copies the object (public member function)

what [virtual]	returns the explanatory string (virtual public member function)

std::bad_exception

Contents

[edit] Member functions

Inherited from std::exception

Member functions

[edit] Example